75134209 has 4 divisors (see below), whose sum is σ = 75170260. Its totient is φ = 75098160.

The previous prime is 75134177. The next prime is 75134219. The reversal of 75134209 is 90243157.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 52780225 + 22353984 = 7265^2 + 4728^2 .

It is a cyclic number.

It is not a de Polignac number, because 75134209 - 2⁵ = 75134177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75134219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14694 + ... + 19135.

It is an arithmetic number, because the mean of its divisors is an integer number (18792565).

Almost surely, 2^75134209 is an apocalyptic number.

It is an amenable number.

75134209 is a deficient number, since it is larger than the sum of its proper divisors (36051).

75134209 is a wasteful number, since it uses less digits than its factorization.

75134209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36050.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 75134209 is about 8667.9991347485. Note that the first 3 decimals coincide. The cubic root of 75134209 is about 421.9677299882.

The spelling of 75134209 in words is "seventy-five million, one hundred thirty-four thousand, two hundred nine".